How to Troubleshoot a Jackleg Drill

Take the drill apart according to the manufacturer's instructions and inspect the parts for damage or oil and dirt deposits if the drill is behaving erratically.

Ensure that air connection lines and openings are clear of obstructions and the air pressure at the drilling site is a minimum of 80 pounds per square inch (psi) by measuring the surrounding air using a barometer if the drill is lacking power.

Check the rifle nut, rifle bar, chuck driver or chuck driver nut for wear and tear if the drill is not rotating properly. Also ensure that the line oiler is properly dispensing 1 pint of oil for every six hours of use.

Make sure that the drill is filled with rock-drill oil that is appropriate for the climate of the drilling area if the drill is overheating.

Disassemble the drill according to the manufacturer's instructions and clean the automatic valve and air passages of the drill if it is not starting. Also check the air screen for dirt or rust accumulation. Confirm that exhaust ports are clear as well.

Verify that dirt has not entered the drill through air lines or exhaust ports if parts are stuck. Also clean the lubricator fill plug and add fresh rock-drill oil to the lubricator to ensure that the rock-drill oil has not oxidized and created gummy deposits that are causing parts to stick.